Abstract: The present disclosure provides a gene combination for expressing and producing terrequinone A in Escherichia coli and use thereof. The gene combination includes a tdiAS gene, a tdiBS gene, a tdiCS gene, a tdiDS gene, a tdiES gene, an sfpS gene, an ScCKS gene, and an AtIPKS gene with nucleotide sequences set forth in SEQ ID NOS:1 to 8. In the present disclosure, a recombinant engineered strain capable of producing terrequinone A having anti-cancer activity is obtained by separately constructing recombinant plasmids pC02 and pU03 through the eight genes and transforming the two recombinant plasmids into E. coli. The content of terrequinone A in a fermentation broth thereof is 106.3 mg/L, which has potential application value in the biopharmaceutical field.

Abstract: Provided is a device for processing an antistress cone of a main insulation layer of a cable. The device includes a support, a clamping unit, a cutting unit and an infeed unit. The clamping unit is mounted on the support and configured to clamp a cable. The cutting unit is slidably disposed on the support, capable of cutting the cable in the radial direction of the cable, and capable of performing feeding in the radial direction of the cable to adjust the cutting depth. The infeed unit is connected to and capable of driving the cutting unit and configured to drive the cutting unit to slide in the axial direction of the cable so that the cutting unit performs feeding and cutting in the axial direction of the cable.

Abstract: Provided is an insulating coating device for an electric wire, including a pressing pipe. The pressing pipe includes two first pressing parts which are configured to divide the pressing pipe into two parts along a longitudinal cross section of the pressing pipe, an inner wall of the pressing pipe is provided with an air bag, and the air bag is provided with an air pipe joint which penetrates to an outside of the pressing pipe. In the insulating coating device for the electric wire, a self-curing insulating material is coated on joints of the electric wires, the air bag is used to squeeze the self-curing insulating material such that the self-curing insulating material is shaped and compacted, so that cavities generated in a coating process is reduced, and the self-curing insulating material is uniformly attached to the joints of the electric wires.

Abstract: A utility vehicle for power emergency repair includes a cab, a carriage and a lighting device, including mounting bases, a wire pole, a rotary base and a lamp assembly. A rotary shaft is bridged between the mounting bases, and the rotary base is fixedly connected to the rotary shaft. First and second positioning units are provided on the top of the carriage. The rotary base has first and second positioning surfaces, the first positioning unit includes a first limiting platform, and the second positioning unit includes a rotation limiting plate and positioning plates. The positioning plates is supported on a lower end surface of the rotation limiting plate. The utility vehicle further includes a driving assembly and first and second contacts. A trigger signal is generated and the driving assembly is controlled to release braking on the rotary shaft when the first and second contacts contact each other.

Abstract: The present disclosure relates to the technical field of cable processing, and discloses a method for processing a reaction force cone of a cable main insulating layer. The method includes: two ends of a cable are clamped through a clamping device, and the cable is enabled to pass through a cutting device; a cutting depth of the cutting device in a radial direction and a cutting position of the cutting device in an axial direction are adjusted; the cutting device is started, and the cable is cut by the cutting device to form the reaction force cone.

Abstract: Described herein is an apparatus and method for enhancing the dynamic range of an analog-to-digital converter (ADC). In one embodiment of the present approach, an analog input signal is amplified in a programmable gain amplifier (PGA) before the ADC receives the signal, so that the gain applied to an input signal, and gain (or attenuation) later applied in order to balance the overall gain of the circuit, occurs only in either the analog domain; in the prior art, gain occurs partly in each domain. The ADC gain is then adjusted to compensate for gain of the PGA and balance the overall gain of the circuit. In another embodiment, the ADC gain is adjusted, and gain of a digital gain element that receives the signal from the ADC is adjusted to compensate for the ADC gain and balance the overall gain of the circuit, eliminating the need for a PGA.

Abstract: The present disclosure relates to the field of cable processing apparatus and discloses a cable radial cutting system and a reaction force cone processing apparatus with the cable radial cutting system. The cable radial cutting system includes a cutting bracket, a planetary gear set, a first driving piece and a second driving piece which are mounted on the cutting bracket, and a cutting tool driven by the planetary gear set to rotate and move radially, where the first driving piece and the second driving piece jointly drive the planetary gear set to rotate.

Abstract: Provided in the present application are a one-time dynamic positioning authentication method, system and password changing method. The method comprises: an authentication server receives an authentication request from a client, generates a positioning factor string, and transmits generated information containing the positioning factor string and a structure of an all-element dynamic factor table to the client; the client receives the generated information, generates the all-element dynamic factor table, and maps the positioning factor string into the all-element dynamic factor table to acquire a dynamic graphical password inputted in accordance with a first positioning rule by a user and transmit to the authentication server; the authentication server receives the dynamic graphical password from the client, and if the first positioning rule corresponding to the parsed dynamic graphical password is consistent with a preset positioning rule, then the authentication is successful.

Abstract: Provided is an insulating coating device for an electric wire, including a pressing pipe. The pressing pipe includes two first pressing parts which are configured to divide the pressing pipe into two parts along a longitudinal cross section of the pressing pipe, an inner wall of the pressing pipe is provided with an air bag, and the air bag is provided with an air pipe joint which penetrates to an outside of the pressing pipe. In the insulating coating device for the electric wire, a self-curing insulating material is coated on joints of the electric wires, the air bag is used to squeeze the self-curing insulating material such that the self-curing insulating material is shaped and compacted, so that cavities generated in a coating process is reduced, and the self-curing insulating material is uniformly attached to the joints of the electric wires.

Abstract: The present disclosure relates to the technical field of cable processing, and discloses a method for processing a reaction force cone of a cable main insulating layer. The method includes: two ends of a cable are clamped through a clamping device, and the cable is enabled to pass through a cutting device; a cutting depth of the cutting device in a radial direction and a cutting position of the cutting device in an axial direction are adjusted; the cutting device is started, and the cable is cut by the cutting device to form the reaction force cone.

Abstract: The present disclosure relates to the field of cable processing apparatus and discloses a cable radial cutting system and a reaction force cone processing apparatus with the cable radial cutting system. The cable radial cutting system includes a cutting bracket, a planetary gear set, a first driving piece and a second driving piece which are mounted on the cutting bracket, and a cutting tool driven by the planetary gear set to rotate and move radially, where the first driving piece and the second driving piece jointly drive the planetary gear set to rotate.

Abstract: Provided is a device for processing an antistress cone of a main insulation layer of a cable. The device includes a support, a clamping unit, a cutting unit and an infeed unit. The clamping unit is mounted on the support and configured to clamp a cable. The cutting unit is slidably disposed on the support, capable of cutting the cable in the radial direction of the cable, and capable of performing feeding in the radial direction of the cable to adjust the cutting depth. The infeed unit is connected to and capable of driving the cutting unit and configured to drive the cutting unit to slide in the axial direction of the cable so that the cutting unit performs feeding and cutting in the axial direction of the cable.

Abstract: Provided in the present application are a one-time dynamic positioning authentication method, system and password changing method. The method comprises: an authentication server receives an authentication request from a client, generates a positioning factor string, and transmits generated information containing the positioning factor string and a structure of an all-element dynamic factor table to the client; the client receives the generated information, generates the all-element dynamic factor table, and maps the positioning factor string into the all-element dynamic factor table to acquire a dynamic graphical password inputted in accordance with a first positioning rule by a user and transmit to the authentication server; the authentication server receives the dynamic graphical password from the client, and if the first positioning rule corresponding to the parsed dynamic graphical password is consistent with a preset positioning rule, then the authentication is successful.

Abstract: The present application provides a dynamic graphical password-based network registration method and system. The method includes: a server receives a registration request transmitted by a client, selects positioning factors from a positioning factor library based on a structure of a full-element dynamic factor table, generates positioning factor strings, and transmits the generated positioning factor strings to the client; the client generates full-element dynamic factor tables based on the structure of the full-element dynamic factor table and the positioning factor strings, wherein a user inputs two dynamic graphical passwords through the full-element dynamic factor tables, and transmits registration information including a user name and the positioning rules corresponding to the dynamic graphical passwords to the server; wherein if the registration information is correct, the positioning rule in the registration information is used as the password of the user.

Abstract: A ratcheting tool includes a head and a handle, and a gear ring disposed in the head defining a first plurality of teeth defining a first arc having a first radius. A first pawl is disposed in the head and defines a front face, a rearward face, and a second plurality of teeth which defines a second arc having a second radius. A second pawl is disposed in the head and defines a front face, a rearward face, and a third plurality of teeth which defines a third arc having a third radius. When the first pawl and the second pawl are disposed with their rearward faces in vertical alignment and their longitudinal center axes are disposed in a common plane, the second arc of the first pawl is offset from the third arc of the second pawl in a direction parallel to the longitudinal center axes.

Abstract: Example ratcheting tools are provided. One example ratcheting tool includes a head, a gear ring, a first pawl, and a second pawl. The gear ring may include a plurality of gear ring teeth disposed about an outer circumference of the gear ring. The plurality of gear ring teeth may define a plurality of gear ring troughs with each gear ring trough being disposed adjacent to a gear ring tooth, and the gear ring may be disposed within the head. The first pawl and the second pawl may also be disposed within the head. The first pawl may include a plurality of first pawl teeth disposed on a first front face of the first pawl. The second pawl may include a plurality of second pawl teeth being disposed on a second front face of the second pawl. The first pawl and the second pawl may be biased towards the gear ring.

Abstract: Example ratcheting tools are provided. One example ratcheting tool includes a head, a gear ring, a first pawl, and a second pawl. The gear ring may include a plurality of gear ring teeth defining a plurality of gear ring troughs with each gear ring trough being disposed adjacent to a gear ring tooth, and the gear ring may be disposed within the head. The first pawl and the second pawl may also be disposed within the head. The first pawl may include a plurality of first pawl teeth disposed on a first front face of the first pawl. The second pawl may include a plurality of second pawl teeth being disposed on a second front face of the second pawl.

Abstract: The present application provides a dynamic graphical password-based network registration method and system. The method includes: a server receives a registration request transmitted by a client, selects positioning factors from a positioning factor library based on a structure of a full-element dynamic factor table, generates positioning factor strings, and transmits the generated positioning factor strings to the client; the client generates full-element dynamic factor tables based on the structure of the full-element dynamic factor table and the positioning factor strings, wherein a user inputs two dynamic graphical passwords through the full-element dynamic factor tables, and transmits registration information including a user name and the positioning rules corresponding to the dynamic graphical passwords to the server; wherein if the registration information is correct, the positioning rule in the registration information is used as the password of the user.

Abstract: A method for preparing self-suspending fracturing proppant, the method including: stiffing and adding 100 g of a proppant to between 1 and 3 g of a surface treating agent until the surface treating agent is uniformly distributed on a surface of the proppant; adding between 0.5 and 2 g of a thickener in the form of a powder to the resulting mixture and stiffing uniformly.

Abstract: Example ratcheting tools are provided. One example ratcheting tool includes a head, a gear ring, a first pawl, and a second pawl. The gear ring may include a plurality of gear ring teeth defining a plurality of gear ring troughs with each gear ring trough being disposed adjacent to a gear ring tooth, and the gear ring may be disposed within the head. The first pawl and the second pawl may also be disposed within the head. The first pawl may include a plurality of first pawl teeth disposed on a first front face of the first pawl. The second pawl may include a plurality of second pawl teeth being disposed on a second front face of the second pawl.